| DEVELOPMENT OF KNOWLEDGE BASED BODY STRUCTURE CONCEPT DESIGN MODEL |
| Won-yong Ki1, Seung-Jin Heo1, Dae-Oh Kang3, Hong Jae Yim1, Kyung won Lee5, Jung ho Kim5, Chang kun Lee5 |
1Kookmin University
3Institute of Vehicle Engineering
5GM Korea |
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| ABSTRACT |
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The purpose of this study is to propose a concept design process for an automotive body structure using technical information on the major joints and members of vehicles. First, in order to collect the technical information on major joints and members, 17 vehicles were selected using benchmark data. The collected technical information for the selected vehicles was the cross sectional shapes of each joint and member which were used for the analysis of joint stiffness, crashworthiness and static stiffness of the member to make a database along with cross section properties. This study applied a ‘What If Study’ technique to perform a concept design of an automotive body using the analyzed information and selected cross section meeting the design objectives. The criteria for the selection of the cross section were defined by subdividing the defined design objectives of an automotive body structure and constraints into members and joints. In order to configure an analysis model of an automotive body structure using the selected cross section, a shape parametric model was used and static stiffness, dynamic stiffness and crashworthiness were assessed to evaluate the configured automotive body structure. The evaluation result showed that the crashworthiness and static/dynamic stiffness were improved compared to an existing body structure. In addition, the weight of the body structure was reduced. Through this study, the process that can rapidly and effectively derive and evaluate the concept design of an automotive body structure was defined. It is expected that, henceforth, this process will be helpful for the study of automotive body structures. |
| Key Words:
Body structure design, Knowledge based design, Conceptual design, What-if design, Cross-section database |
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